• Extension Drill Rod Drilling Rod Rock Drilling tools MF MM Manufacturers, Extension Drill Rod Drilling Rod Rock Drilling tools MF MM Factory, Supply Extension Drill Rod Drilling Rod Rock Drilling tools MF MM
  • Extension Drill Rod Drilling Rod Rock Drilling tools MF MM Manufacturers, Extension Drill Rod Drilling Rod Rock Drilling tools MF MM Factory, Supply Extension Drill Rod Drilling Rod Rock Drilling tools MF MM
  • video
Extension Drill Rod Drilling Rod Rock Drilling tools MF MM
  • Gaea
  • China
  • 5-25天

All our drifting and extension drill rods are heat-treated with carburization or high frequency, combinated with phosphorization.
Gaea Rock is drill rods manufacturers(drill pipe suppliers,drill pipe manufacturers).

Extension Drill Rod Drilling Rod Rock Drilling tools MF MM

Extension Rod(drill extension rods)

Gaea is a professional manufacturer of rock drilling rod(water well drill rods), Rock drifting and extension drill rods(machining drill rod) are for in drifting, tunneling, long-hole drilling, bench and production drilling industries. These rods are produced with round or hexagonal sections in all common thread designs, and in Male/Male (M/M) or Male/Female (M/F) connections. All our drifting and extension drill rods are heat-treated with carburization or high frequency, combinated with phosphorization


Male/Female (M/F) rod, speed rod(tool steel drill rod)

drilling Rod

It is common practice to bump up the drive end of drifting drill steel for added strength at the rock drill end to accommodate larger diameter and shank adapters. Drill steel of rock drilling tools is available in many standard lengths to match the drill feeds on a multitude of available drifting jumbos. A rock drill bit(thread button bits) diameter closer to the steel diameter can be used since the coupling does not enter the hole, this enhances flushing and hole accuracy.


Male/Female (M/F) Steel(mining drill rods)

Extension drill rods


Male/Female drill steel(mining drill rods) provides more rigid connections and is easier to uncouple and handle. The service life also tends to be better than with separate couplings. This is fortunate because the coupling end cannot be replaced.


M/F drill steel(mining drill rods) is an alternative to couplings sleeves to include the female part of the threaded connection as an integral part of the drill steel. M/F drill steel provides more rigid connections and is easier to uncouple and handle. The service life also tends to be better than with separate couplings. The advantages of drilling with M/F steel include: Easy handling, quicker uncoupling, tighter connections, the potential to drill straighter holes, and longer service life.


 rock extension


The round cross sections are more prevalent for extension drilling applications. A round rod has less material and thus is lighter to handle and less expensive than an equivalent size hexagonal rod. While hexagonal rod is particularly advantageous for drifting and tunneling drilling. The increased rigidity of hexagonal drill rods enables them to abating hole-deviation and enhances flushing for cleaning holes. Even with the larger cross section, hexagonal steel can still accommodate the same diameter bit as that of an equivalent round steel.


drilling Rod

M/F rods provides tighter connections and is easier for handling and quicker for uncoupling than M/M rods, and are potential to drill straighter holes.


Carburization technique is mainly used in the production of big diameter rods to ensure excellent performance. Carburizing is for hardening entire rod to provide an external over entire rod surface area. Carburized steels are used primarily in underground applications and where water is used as a flushing medium. High Frequency technique is primarily used in the production of small diameter rods to reduce fragileness of drill steels. High Frequency is for hardening only the thread ends of the rod. This provides the longevity of the product as well as being more suitable for more drilling condition need. Steels produced with this technics primarily used in surface drilling applications where air is the primary flushing medium. Phosphorising is to improve anti-erosion capability of the entire external rod surface area.


Extension drill rods 


Get the latest price? We'll respond as soon as possible(within 12 hours)

Privacy policy

close left right